I'd like to ask a question to experts here. I'd like to sell some ebooks and regarding piracy, a friend told me a great idea:
to add the buyer's name as a watermark in every page of the book. This way, combined with encryption and security features, would make very difficult for someone to share it without everyone seeing his name and email.
But now, the question is: for few quantities, I believe Acrobat can do, but is there any adobe service or server that can generate this personalized copy of the PDF with the watermark?